erlmerge with a proxy authentication

[Rachwal Waldemar-AWR001]

I was curious if erlmerge helps to install, but to use it from a
corporate network I have to provide proxy URL with a name and password
to be authenticated. It seems that erlmerge doesn't allow to specify
more than just simple URL (host:port). Is there any workaround except
setting up an own simple proxy to the proxy at the firewall, or it needs
to be implemented in erlmerge?
Regards,
WR.